Nissan Altima 2007-2012 Service Manual: Front tweeter (coupe)

Description

The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front tweeters using the audio signal circuits.

Diagnosis Procedure

1.HARNESS CHECK

1. Disconnect BOSE speaker amp. connector B122 and suspect tweeter connector.

2. Check continuity between BOSE speaker amp. harness connector B122 (A) and suspect tweeter harness connector (B).

3. Check continuity between BOSE speaker amp. harness connector B122 (A) and ground.

Are continuity test results as specified? YES >> GO TO 2

NO >> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

2.FRONT TWEETER SIGNAL CHECK

1. Connect BOSE speaker amp. connector B122 and suspect tweeter connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between BOSE speaker amp. harness connector B122 terminals with CONSULT-III or oscilloscope.

Are voltage readings as specified? YES >> Replace suspect tweeter. Refer to AV-440, "Removal and Installation".

NO >> GO TO 3

3.HARNESS CHECK

1. Disconnect AV control unit connector M47 and BOSE speaker amp. connector B121.

2. Check continuity between AV control unit harness connector (A) M47 and BOSE speaker amp. harness connector B121 (B).

3. Check continuity between AV control unit harness connector B121 (A) and ground.

Are continuity test results as specified? YES >> GO TO 4

NO >> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

4.FRONT TWEETER SIGNAL CHECK

1. Connect AV control unit connector and BOSE speaker amp.

connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector terminals with CONSULT-III or oscilloscope.

Are voltage readings as specified? YES >> Replace BOSE speaker amp. Refer to AV-438, "Removal and Installation - Coupe".

NO >> Replace AV control unit. Refer to AV-437, "Removal and Installation".

    Front door speaker (sedan)
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front door speakers using the audio signal c ...

    Tweeter (sedan)
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the tweeters using the audio signal circuits. Dia ...

    Other materials:

    Diagnosis and repair workflow
    Repair Work Flow WORK FLOW WT-5, "Preliminary Check" WT-52, "Self-Diagnosis (With CONSULT-III)" WT-53, "Self-Diagnosis (Without CONSULT-III)" WT-55, "Symptom Table" DETAILED FLOW 1.CUSTOMER INFORMATION Interview the customer to obtain detailed inform ...

    P0112, P0113 IAT sensor
    Description The intake air temperature sensor is built-into the mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the ...

    P0725 engine speed signal
    Description The engine speed signal is sent from the ECM to the TCM by CAN communication line. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn i ...